// Buttons
.button-variant(@color; @background;@px:0; @border:none) {
  color: @color;
  background-color: @background;
  border:@px solid @border;
}
// Button sizes
.button-size(@padding-vertical; @padding-horizontal; @font-size; @line-height; @border-radius: 5px) {
  padding: @padding-vertical @padding-horizontal;
  font-size: @font-size;
  line-height: @line-height;
  border-radius: @border-radius;
}

.button-width(@width; @height; @font-size; @line-height; @border-radius: 5px) {
  width: @width;
  height: @height;
  font-size: @font-size;
  line-height: @line-height;
  border-radius: @border-radius;
}